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-rw-r--r--arch/s390/include/asm/vtime.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/s390/include/asm/vtime.h b/arch/s390/include/asm/vtime.h
new file mode 100644
index 0000000000..fe17e448c0
--- /dev/null
+++ b/arch/s390/include/asm/vtime.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _S390_VTIME_H
+#define _S390_VTIME_H
+
+#define __ARCH_HAS_VTIME_TASK_SWITCH
+
+static inline void update_timer_sys(void)
+{
+ S390_lowcore.system_timer += S390_lowcore.last_update_timer - S390_lowcore.exit_timer;
+ S390_lowcore.user_timer += S390_lowcore.exit_timer - S390_lowcore.sys_enter_timer;
+ S390_lowcore.last_update_timer = S390_lowcore.sys_enter_timer;
+}
+
+static inline void update_timer_mcck(void)
+{
+ S390_lowcore.system_timer += S390_lowcore.last_update_timer - S390_lowcore.exit_timer;
+ S390_lowcore.user_timer += S390_lowcore.exit_timer - S390_lowcore.mcck_enter_timer;
+ S390_lowcore.last_update_timer = S390_lowcore.mcck_enter_timer;
+}
+
+#endif /* _S390_VTIME_H */